Technical information

• when servicing the appliance, the composition and state of heat carrying

ﬂ uid must be checked, as well as the absence of any refrigerant.

• during the annual unit sealing test in accordance with valid legislation, the

high and low pressure switches must be checked to ensure they are secure-

ly fastened to the refrigeration circuit and that they shut-off the electrical

circuit when tripped.

• during maintenance work, ensure there are no traces of corrosion or oil

around refrigeration components.

• before beginning work on the refrigeration circuit, isolate the appliance

and wait several minutes before removing the temperature or pressure

sensors. Certain elements such as the compressor and associated piping

may attain temperatures in excess of 100°C and high pressures with the

consequent risk of severe scalding.

10.2 Repair

• all work on the refrigeration circuit must be carried out with total respect

of valid safety regulations and acceptable professional practice: recupera-

tion of refrigerant, nitrogen brazing, etc…

• all brazing work must be carried out by a qualiﬁ ed brazer/welder,

• in the case of units ﬁ lled with R410A, refer to the speciﬁ c indications in the

installation instructions.

• this unit contains pressurized components, some of which may be manu-

factured by ZPCE, this is the case of piping elements. Only use the original

spare parts indicated in the spare parts list to replace a defective refrigera-

tion component

• replacement pipes must always be made of copper in compliance with

standard NF EN 12735-1.

• leak detection, pressure test:

- never use oxygen or dry air, risk of ﬁ re or explosion,

- use dry nitrogen or the mixture of nitrogen and refrigerant indicated on

the name plate,

- the test pressure for both the high and low pressure circuits must not

exceed 42 bar.

• the high pressure circuit pipes are made of copper and have a diameter

equal to or greater than 1’’5/8. A certiﬁ cate as indicated in §2.1 in compli-

ance with standard NF EN 10204 will be requested from the supplier and

ﬁ led in the installation technical documentation.

• the use of non-original spare parts, modiﬁ cations to the refrigeration cir-

cuit, replacement of the refrigerant with a refrigerant type other than that

indicated on the name plate, use of the appliance under conditions out-

side the application limits indicated in the associated documentation will

result in a cancellation of the EC label and PED conformity and the person

who carried out these modiﬁ cations will be sole responsible for the conse-

quences.